Valve for a water-supply system

Abstract

A valve for a plumbing system has a housing with an inlet and an outlet and a valve body movable in the housing between a throttle position with a decreased a flow cross section and reduced flow between the inlet and outlet and an open position with a large flow cross section and free flow between the inlet and outlet. Structure in the valve body applies hydraulic pressure from the inlet or outlet to the valve body to shift same into the throttle position when a pressure differential between the inlet and the outlet exceeds a specified value and into the open position in the absence of a pressure differential between the inlet and the outlet.

Description

FIELD OF THE INVENTION[0001]The present invention relates to valve. More particularly this invention concerns such a valve used in a bathwater circulating system.BACKGROUND OF THE INVENTION[0002]A fluid valve such as usable in a household plumbing system typically has a housing with an inlet and an outlet, and a valve body is fed so as to move longitudinally within the housing. In practice, such fluid valves are used for varying a flow cross section of a fluid passage.[0003]The present invention specifically relates to a fluid valve whose flow cross section is reduced in a throttle or flow-impeding position, so that on flow through the valve a pressure drop results between the inlet and the outlet. As a result, a pressure differential is present between the inlet and the outlet and the amount of liquid flowing through the fluid valve is limited.[0004]Consequently, within the context of the invention, the term pressure differential between the inlet and the outlet refers to a higher ...

AI Technical Summary

Benefits of technology

[0015]Another object is the provision of such an improved valve, in particular for a bathwater circulating system that overcomes the above-given disadvantages, in particular that is characterized by high operational security and low maintenance requirements.

[0056]Within the framework of the invention, preferably a centrifugal pump is provided as pump. The pump is to be chosen such that, at the lowest possible cost and a low development of noise, a good thorough mixing of the drawn-out bathwater and aspirated ambient air is achieved.

Problems solved by technology

As a result, a pressure differential is present between the inlet and the outlet and the amount of liquid flowing through the fluid valve is limited.

When using the fluid valve as a pressure-reducing valve in a plumbing system, there is a risk that the fluid valve becomes clogged up with impurities and will become impaired in its function thereby.

A similar risk of clogging with impurities is present also in other applications.

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